Shaving implement



June ll, 1940. y J. MURos I sHAvING IMFLEMENT Filed Sept. 18,. 1937 l'uuuuuuuuiuunnllulluuu l I INVENTOR Patented June 11, 1940 UNITED sTATEs PATENTl oFFlcE SHAVING IMPLEMENT Joseph Muros, Cambridge, Mass., assigner to Gillette Safety Razor Company, Boston, Mass., a corporation oi'Deiaware Application September 18, 1937, SerialNo. 164,426

3 Claims.

` This invention relates to dry shaving implements of the general type which employ elongated,

the skin of the user in the shaving area. 'I'his f tends to make'the individual hairs stand out in divergent relation and facilitates the engagement thereof by the shearing teeth close to the surface from which they spring.

'I'hese desirable results are accomplished in accordance with the present invention by impart-l ing an inwardly inclined slope to the skin-engagf ing faces of shearing teeth arranged in opposed series. rIn'vhe teeth may be continuous in transverse contour or they may be interrupted .in the I longitudinal axis of the implement, but in either case the outer or marginal zones are higher than the inner or.central zone of the teeth with the result that, when the implement -is pressed against the face in shaving, a convex contour is imparted to the area engaged and a particularly close shave may be obtained with comfort in a short interval of time.

Another feature of my invention consists in shearing teeth which are given a. lateral outward taper so that the effective opening between adjacent teeth increases outwardly as the thickness of the teeth increases. Stated in another way, the divergent side walls of adjacent teeth. form cavitiesincreasing outwardly in cross section in which the skin of the user takes a convex contour. This results in shearing teeth of strong construction which give a uniform close shaving effect regardvless oi outwardlyV increasing thickness.

These andvotherfeatures of my invention will be best understoodand appreciated from the following description of a preferred embodiment` lelevation of a portion of the shaving head as positioned upon the faceof the user;

Fig. 6 is a cross-sectional view corresponding to Figs. 1 and 2; and

Fig. 7 is a fragmentary cross-sectional view on a still larger scale. I

'I'he illustrated implement comprises a casing III of Bakelite or other plastic material` moulded to serve asa handle and also as a housing for the operating motor. The housing ID is provided in its end with a socket to receive the metallic shaving head of the implement and one wall of this socket is threaded to receive a clamping screw I I by whichI the head is securely held in place.

The head is generally elongated and rectangular in outline and as herein shown comprises a pairpf identical side members I2 separated by spacing blocks I3 and held rigidly in assembled relation by transverse screws I4'. Each of the side members I2 is provided along its upper edge with a series of uniformly spaced transverse shearing teeth I5 and these are arranged in opposed relation with a narrowslot between their inner edges and overhang to some extent the inner vertical side walls of the members I2 as best shown in Fig. 'i'. The teeth I5 taper inwardly, having flatdownwardly and inwardly inclined skin-engaging faces and thus provide on opposite sides of the implement inwardly converging areas which are effective in imparting a convex contour lto the skin ofthe user when the implement is pressed against it.

Each series of teeth I5 is protected by an end ing to create a divergent condition in the hairs best adapted for close shaving. Further, through the tapering slots the skin of the user extends more and more deeply as-the Athickness of the teeth increases. The result is that a uniforml close shaving action is brought about throughout the full length of the teeth.

Arranged to reciprocate between the two side members I2 is an elongated cutter 20 having spaced upwardly extending fianges which are transversely slotted to. form shearing teeth cooperating with the teeth I5, that is, the upper edges of the teeth 2l co-operate in shearing with thelower edges of the stationary teeth I5. 'I'he cutter 20 has in its lower face a recess in which is received the upper rounded end of an operating arm or lever I9 whichis oscillated at a highirate of speed by the motorand 'so imparts rapid reciprocation to the cutter.

Having thus' disclosed my invention and shown a preferred embodiment thereof for purposes of illustration but not in any limiting sense, what I claim as new and desire to secure by Letters Patent is: 1

1. A dry shaving implement having opposed side portions withvparallel inner walls and in- .wardly projecting teeth having their shearing Walls disposed in a single plane and substantially at right angles to said parallel walls, and a movable cutter having teeth with shearing walls tting against the walls of said side portions, the

teeth of said side portions having outwardly and upwardly inclined upper faces arranged collectively to impart a convex-contour to the skin of the user in the shaving area and diaving outwardly diverging bevelled surfaces widening the space between the teeth as the teeth themselves become progressively thicker.

2. A dry shaving implementvincludling in its structure spaced side'members having inwardly overhanging flanges serrated to present teth with present face-engaging areas extending outwardly and upwardly and of tapering width, thereby collectively imparting a convex contour of the skin of the user in the area engaged by the implement.

3. A dry shaving limplement comprising opposed side members with inwardly projecting overhanging teeth presenting shearing edges, the shearing edges on bothside members lying in a common plane, and a movable cutter having,

cooperating shearing teeth, the opposed side i members being slotted to present face-engaging areas and shearing teeth constantly increasing in thickness as they extend outwardly, thus imparting a transversely concave contour to the faceengaging end of the implement and the side walls lof the slots beingdivergent so that the crosssectional area of the slots is constantly enlarged as the thickness of the teeth is increased.

JOSEPH MUROS. 

